A test for a 300mm f/4 Pentax lens.
A wonky connection to an ST-X10ME CCD and overcoming the lack of an aperture ring on the lens were issues requiring overcoming.
Still the 4 hr Ha exposure indicates the lens is a winner.
NGC 3199 is the bright arc like structure. The other bright patch to the right is NGC 3247.
Full resolution here.
http://members.iinet.net.au/~sjastro...99_3247Ha.html
Regards
Steven